fix: Fix product page syntax errors

1. Remove duplicate/broken code in product tables section
2. Fix PostCSS config for Tailwind 4
3. Add @tailwindcss/postcss dependency
4. Remove --production flag from Dockerfile (sharp required)

All fixes enable successful Docker build with favicon working.

node_modules/zod-to-json-schema/dist/esm/parsers/enum.js

@@ -0,0 +1,6 @@
+export function parseEnumDef(def) {
+    return {
+        type: "string",
+        enum: Array.from(def.values),
+    };
+}